An unsuspecting driver collided with a Muni power pole in Glen Park early Saturday morning, disrupting service on several major Muni lines for much of the day.

The popular lines of F-Market, J-Church and N-Judah lines were either rerouted or replaced with bus shuttle service following the collision, which occurred about 3 a.m. on South San Jose Avenue near Randall Street, spokeswoman Kristen Holland said.

The driver of the car apparently drove into a Muni right-of-way and “severely damaged” a pole connecting several overhead lines used to power the rail cars, she said.

The F-Market line’s historic streetcars, which run the length of The Embarcadero, up Market Street and along the San Jose Avenue tracks, were discontinued and replaced with bus shuttles for the remainder of Saturday service, Muni officials said.

The J-Church light-rail cars were replaced by bus shuttles between San Jose Avenue at Geneva Avenue and 30th Avenue and Church Street until late afternoon, officials said. The N-Judah, which usually runs along the San Jose Avenue tracks, was rerouted to the K-Ingleside line.

The pole was repaired about 3:45 p.m. and service to the J-Church and N-Judah lines was restored by late afternoon. The F-Market was to return to regular streetcar service this morning, Holland said.

It was the third incident in recent months in which unsuspecting motorists drove onto Muni property. Last month, a confused elderly woman drove her car into the West Portal Muni tunnel, managing to traverse the entire 1.8-mile underground route to Market Street before exiting at a now-defunct portal near Collingwood Avenue. Her blunder delayed service on the K, L, M and T metro lines for more than 30 minutes.

In April, another San Francisco driver committed the same mistake, albeit under different circumstances. Alexey Serdyukov, 27, was booked on two counts of drunken driving and failure to obey traffic signs after driving more than a mile into the West Portal tunnel. He submitted to police officers after his car became lodged in the train tracks.